T-mobile Usa, Inc.

Chingming Chao

Mehul Jayant Shah

Vinod Ravichandran

Adrian T Synal

Michele Kinsey

A mobile device, via a roaming platform, can switch IMSIs (e.g., Home IMSI-, Roamer IMSI-, etc.) depending on a location of the mobile device. Upon switching IMSIs, the roaming platform can forward the update location to an HLR of the home network and roaming network. If the MMSC on the home network receives an MMS message, the MMSC on the home network may query the HLR for a current location. From the query, if the message recipient is roaming, the MMSC on the home network may communicate with the MMSC on the roaming network to deliver the message. As a result, the roaming network can handle the routing of the message without a data session routed back through the home network.

MMS termination on different networks

A mobile device, via a roaming platform, can switch IMSIs (e.g., Home IMSI-1, Roamer IMSI-2, etc.) depending on a location of the mobile device. Upon switching IMSIs, the roaming platform can forward the update location to an HLR of the home network and roaming network. If the MMSC on the home network receives an MMS message, the MMSC on the home network may query the HLR for a current location. From the query, if the message recipient is roaming, the MMSC on the home network may communicate with the MMSC on the roaming network to deliver the message. As a result, the roaming network can handle the routing of the message without a data session routed back through the home network.

Automated unavailability response for call handling is used to notify an incoming caller that a subscriber is unavailable to answer the incoming call. An incoming call that is initiated from an originating caller device is received at a network server for routing to a terminating user device of a specific subscriber. A user profile of the specific subscriber that includes one or more unavailability notification settings for the incoming call is retrieved from a user profile database. An unavailability notification message is selected from a data store based at least on the one or more unavailable notification settings. The unavailability notification message is sent from the network server to the originating caller device.

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Bellevue, WA, United States of America

Chingming Chao